防止离心泵产生气蚀现象,提高进液装置的有效气蚀余量的措施有()。A、增加泵前液面压力 发布时间:2019-09-28 03:20 │ 来源:www.tikuol.com 题型:多项选择题 问题: 防止离心泵产生气蚀现象,提高进液装置的有效气蚀余量的措施有()。A、增加泵前液面压力B、减少安装高度C、改为倒灌装置D、减少流动损失
题型:多项选择题 —Could you tell me ? —Because she likes her students very much. [ ]A. why so many students like the teacher B. why do so many students like the teacher C. why did so many students like the teacher D. why so many students liked the teacher 查看答案